Mwanza City, also known as Rock City to the residents, is a port city and capital of Mwanza Region on the southern shore of Lake Victoria in north-western Tanzania. With an urban population of 1,311,000 in 2023, it is Tanzania's second largest city, after Dar es Salaam.
It is also the second largest city in the Lake Victoria basin after Kampala, Uganda and ahead of Kisumu, Kenya at least in population size. Within the East African community, Mwanza city is the fifth largest city after Dar, Nairobi, Mombasa, and Kampala. It is slightly ahead of Kigali, Kisumu, and Bujumbura in the population of city proper limits.
Mwanza city is also the capital city of Mwanza Region, and is administratively divided into two municipal districts within that Region - Ilemela and Nyamagana